Unable to install Wifi dongle driver

I bought a Wifi dongle, it is supposed to be RPi compatible but I am unable to get it to work. I don’t understand the instructions to install the driver. Can anyone dumb it down for me. Do I just copy-paste the driver to my SD memory where the OS resides? Do I need to write something into the OS? If so how, when I connect a keyboard and mouse to the RPi I get a Volumio OS running message but cannot input any commands from the keyboard!

You are not the only one.
I have the same problem. Wanting to install a WiFi dongle but I don;t know how.
Hopefully somebody answer this post.

The sam here.

there is no need to install anything just take a support dongle an disable the onboard WiFi.